verify function
検証
Implementation
bool verify({
required String sig,
required String sigContent,
required String pubJwk,
}) {
final json = jsonDecode(pubJwk);
final jwk = JsonWebKey.fromJson(json);
final sigConBuf = const Utf8Encoder().convert(sigContent);
final sigBuf = const Utf8Encoder().convert(sig);
return jwk.verify(sigConBuf, sigBuf, algorithm: 'ES512');
}